Reactions of antioxidants with molecular oxygen. Part I. 2,2′-methylene-bis(4-methyl-6-tert-butylphenol) in silicone matrix

R. Navarro (1) , Ludmila Audouin (1) , Jacques Verdu (1)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux

The reaction of 2,2′-methylene-bis(4-methyl-6-tert-butylphenol) stabiliser with oxygen was studied in an inert substrate at 80-120°C temperature under 0.02-3.0 MPa oxygen pressure ranges. UV/VIS spectrophotometry and Gel Permeation Chromatography were used to follow the antioxidant consumption and the formation of oxidation products. A simplified mechanistic model of stabiliser oxidative transformation was proposed and corresponding kinetic parameters were determined and compared with the kinetic values obtained by other authors.

Mots clés: GPC - Kinetics - Phenolic antioxidant - Thermal oxidation - UV/VIS

Domaines: Matériaux

R. Navarro, Ludmila Audouin, Jacques Verdu. Reactions of antioxidants with molecular oxygen. Part I. 2,2′-methylene-bis(4-methyl-6-tert-butylphenol) in silicone matrix. Polymer Degradation and Stability, 2011, 96 (2), pp.220-225. ⟨10.1016/j.polymdegradstab.2010.11.012⟩. ⟨hal-02456005⟩